my apologies i didnt check for any typing errors before i submitted. i will be using a 6L80E not a 5L80E which i doubt exists lol. i plan on buying wiring harnesses figured it would be smarter and faster. im not planning on doing any tear downs and rebuilds on the motor. ive located a few 6.0s ranging anywhere from 700 to 1500 all with some warranty on them and all im wanting to do is do away with the 5.7/4L60E and go 6.0/6L80E. maybe later on down the road ill start doing some modding to the motor making it put out more but not right now.